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2. Engage safety start interlock system, buckle seat belt if
tractor has seat belt.
3. Set parking brake.
4. Set throttle at approximately 1/3 OPEN position.
5. 4200 & 4400 — Rotate key switch counterclockwise
to PRE-HEAT; hold this position for 15 seconds when
temperature is above freezing, or for 30 seconds when
temperature is below freezing. This operation is not
necessary when restarting a warm engine.
4420 & 4600 — Rotate key switch counterclockwise
to PRE-HEAT; hold this position until glow plug light
goes off. This is necessary only when the temperature
is below 50° F. This operation is not necessary when
restarting a warm engine.
Shown below are the standard preheating times for
various temperatures. This operation, however, is not
required when the engine is warmed up.
Failure to follow these recommendations can lead
to premature failure of the starter motor and the
fuel shut-off solenoid.
NOTICE: Ether, or other starting fluids, must
never be used as a starting aid with this engine.
Warranty will be denied when engine damage
results from such use.
6. Rotate key switch full clockwise to START position,
release key immediately after engine starts.
NOTE: If the engine does not start 10 seconds after
the starter switch is set at “Start”, wait for another 30
seconds and then start the engine starting sequence
over again. Do not allow the starter motor to run
continuously for more than 20 seconds.
7. Check to make sure the engine oil pressure and
alternator warning lights are off. If not, stop engine
immediately and check for the cause.
8. Allow the engine to idle a few minutes before
advancing the throttle or engaging the hydraulic pump.
This allows the hydraulic oil to warm up for easier
system circulation.
9. Stop the engine by disengaging drive clutch and
throttle back to low idle for a couple of minutes; move
steering control levers to neutral, engage neutral lock
levers; then rotate ignition key counterclockwise to the
OFF position. Remove the key from switch before
leaving the tractor and set parking brake.
10. If the machine is allowed to run out of fuel, bleeding
the fuel system will be required before restarting the
engine. Refer to the Maintenance & Adjustment - Fuel
System section of this manual.
WARNING: Excessive starter cranking after
running out of fuel and not following proper fuel
system bleeding will lead to premature failure of
the starter motor and/or the fuel shut-off
solenoid.
Models 4300 and 4500:
1. Before starting the tractor each day, perform daily
preoperation checking.
2. Your Hustler tractor incorporates a safety interlock
system. Designed to protect the operator and others
from accidental injury, this system prevents
unintentional engine starting.
The engine starter will not engage until:
A. Steering control lever front and rear neutral locks
are set.
B. PTO clutch switch is in the “OFF” position.
WARNING: The safety interlock system should
not be disconnected or bypassed.
NOTE: The operator’s seat is equipped with a
separate safety switch. If for any reason the operator
should become unseated when the neutral lock is
disengaged or the PTO switch in the “ON” position,
this switch will open and engine will stop.
3. Disengage the hydraulic clutch lever to lessen drag on
the starter motor, particularly when oil is cold.
4. Advance throttle to approximately 1/4 open slot.
5. Insert key in ignition switch and rotate full clockwise
to engage starting motor. Release key when engine
fires.
NOTE: Continuous cranking for longer than 20
seconds may damage the starter motor. After
continuous cranking for 20 seconds, wait two
minutes before engaging starting motor again.
728444 Rev. 11/02
3-4
Figure 3-7
Ambient Preheating time
temperature Ordinary heat type
Above 10°C (50°F) No Need
10°C (50°F) to Approx. 6 seconds
-5°C (23°F) (Pre-heat position until glow
plug light goes off)
Below -5°C (23°F) Approx. 12 seconds
(Pre-heat position until glow
plug light goes off the
second time)
Limit of
continuous use 20 seconds